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tractor configuration
An aircraft constructed with a tractor configuration has the engine mounted with the propeller in front of it so that the aircraft is "pulled" through the air, as opposed to the pusher configuration, in which the propeller is behind the engine and "pushes" the aircraft forward.
In the early years of powered aviation both tractor and pusher designs were common. However, by the midpoint of the First World War, interest in pushers declined and the tractor configuration dominated. Today, propeller-driven aircraft are assumed to be tractors unless it is stated otherwise.
==Early usage of term==
As early as 1910, in the early years of flying, a distinction was made between a propeller ("pushes the
machine", akin to a ship's propeller) and a tractor-()screw ("pulls the machine through the air").〔("Propellers and tractor-screws" ) Correspondence ''Flight'' 23 April 1910.〕 The Royal Flying Corps called the tractors "Bleriot type" after Louis Bleriot to distinguish them from pushers, or "Farman type".
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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